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Jiyi Patented Feb. 17

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UNTTEE STATES PATENT @rrrcE.

ROBERT GAIGEE, or wEsT HoBoKEN, NEW JERSEY.

RUBBER-STAMP HAND-PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 312,455, dated February 17, 1885.

A pplication filed January I, 1384.

To all whont it may concern:

Be it known that 1, ROBERT GAIGER, of West Hoboken, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Rubber- Stamp Hand-Printing Machines, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan view of one of my improved machines. Fig. 2 is a sectional end elevation of the same,taken through the line a0 50, Fig. 1, and shown with the inking-roller thrown forwards Fig. Sis an end elevation of the same, shown with the stamp forced down to make an impression.

The obj eet of this invention is to promote convenience in operating rubber-stamp handprinting machines, and secure efficiency in the operation of such machines.

The invention consists in a rubberstamp hand-printing machine constructed with end plates slotted to receive the inking-roller,and

connected by,a socketbar provided with one or more spring-supported plungers carrying the stamp, and operated by cams with which are connected slotted arms carrying the inking-roller, as will be hereinafter fully described.

A is the bed-plate of the machine, to the ends of which are' attached the lower edges of the end plates,B. The end plates, B, are connected at their upper forward corners by a bar, 0, in which are formed, or to which are attached, two square sockets, D, to receive the square plungers E. By making the plungers E and sockets D square the said plungers are held from turning while moving up and down.

To the lower ends of the plungers E are attached cross-head plates F, the side edges of which are beveled upon the upper sides to cause the said plates to fit into dovetailed grooves in cleats G, attached to the rubber stamp H, so that the stamps can be readily detached and replaced by others. The square plungers E are made hollow, and in the spaces thus formed are placed spiral springs I, the lower ends of which rest against pins J. The

(No model.)

pins ,J pass through vertical slots in the sides of the plungers E, and their ends are attached to-the sides of the sockets D. The upper ends of the springs I restagainst pins K, the ends of which are secured in holes in the upper parts of the sides of the plunger E. WVith this construction, when the plungers are forced downward to make an impression, the springs I are compressed, so that they will raise the plungersE and their attachments promptly when the downward pressure upon the plungers is removed.

To the upper ends of the plungers E are pivoted small rollers L, for the cams M to rest upon when forcing the said plungers downward. The outer ends of the cams M are connected by a round, N, which serves as a handle for operating the said earns. The inner ends of the cams M are formed upon or rigidly attached to the ends of a shaft, 0, the ends of which are journalcd to the end plates, B, at points a little in the rear of the ends of the bar 0. The ends of the shaft 0 project, and to them are attached the ends of arms P, the outer parts of which are slotted longitudinally to receive the ends of the roller Q, which pass through slots It in the end plates, B, and have pads attached to them to receive ink and transfer it to the stamp H. The slots B pass down through the rear parts of the end plates, B, are curved forward, and extend horizontally nearly to the forward edges of.

the said end plates, the said horizontal parts of the slots being in such positions that the roller Q while passing through them will be in contact with and will apply ink to the face of the stamp H. The upward movement of the stamp H is regulated to keep its face in proper position to receive the ink by rubber washers S,placed upon the lower parts of the plungers E, between the cross-plates F and the lower ends of the sockets D, and which can be placed upon and removed from the said plungers as may be required.

'In the rear part of the baseplate A is formed a cross-groove, T, to receive a stop, U, for the edges of the paper-to strike against,so that the printing will be done in a suitable position on each sheet. Several grooves T are formed in the plate A to receive the stop U, so that the said stop can be adjusted as the size of the paper may require.

V are rods which slide in holes in the end parts of the base-plate A, (shown by dotted lines in Fig. 3, and also in Fig. 2,) and have a cross-bar, W, attached to their outer ends. The rods V also pass through holes in the ends of a second cross-bar, X, so that the said cross bar X can be adjusted midway between, the cross-bar W and the edge of the base-plate A. The rods V and the cross-bars XV X form an extension-frame to support the outer parts of the paper when long sheets are to be printed upon, and which, when not required for use, can be pushed in against the forward edge of the base-plate A, as shown in Figs. 1 and I have described the machine as being made with two plungers and two cams; but it can be made with one plunger and one cam, if desired.

Having thus fully described my invention,

I claim as new and desire to secure by Letters Iatent l. The combination, with the shaft 0, the cams M thereon, slotted end plates,B, inkingroller Q, journaled therein, and the slotted arms P, for operating the roller, of the spring set forth.

ROBERT GAIGER. 'Witnesses:

J AMES T. GRAHAM, G. SEDGWIOK. 

